222221102002121 has 4 divisors (see below), whose sum is σ = 225034027344000. Its totient is φ = 219408176660244.

The previous prime is 222221102002117. The next prime is 222221102002199. The reversal of 222221102002121 is 121200201122222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222221102002121 - 2² = 222221102002117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222221102002093 and 222221102002102.

It is not an unprimeable number, because it can be changed into a prime (222221102002111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406462670821 + ... + 1406462670978.

It is an arithmetic number, because the mean of its divisors is an integer number (56258506836000).

Almost surely, 2^{222221102002121} is an apocalyptic number.

It is an amenable number.

222221102002121 is a deficient number, since it is larger than the sum of its proper divisors (2812925341879).

222221102002121 is an equidigital number, since it uses as much as digits as its factorization.

222221102002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812925341878.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222221102002121 its reverse (121200201122222), we get a palindrome (343421303124343).

The spelling of 222221102002121 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred two million, two thousand, one hundred twenty-one".